P-11 Satellite Bus
Data current as of 2026-07-20.
The P-11 bus accounts for 35 cataloged objects, of which 5 are in orbit and 0 are active. 30 have reentered. Most are built by LMSC/EDLS. The largest operator on this bus is National Reconnaissance Office. The first launched in 1963, the most recent in 1979.
5
In orbit
0
Active
35
Total launched
30
Reentered
P-11 launched per year
Still in orbit Since reentered Click a year to list its satellites.
Typical specifications
Most common values across cataloged P-11 satellites.
| Manufacturer | LMSC/EDLS |
|---|---|
| Purpose | ELINT, SIGINT |
| Launch mass | 95 kg |
| Dry mass | 95 kg |
| Length | 0.3 m |
| Diameter | 0.8 m |
| Span | 0.8 m |
| Shape | Box |
| Power | Solar cells, batteries |
| Propulsion | SRS Motor |
| Equipment | ? |
| Typical orbit | 114 min period, 80° inclination |
Top operators
Top countries
US 35
P-11 satellites
Track any of them live in KeepTrack.
| Name | NORAD | COSPAR | Owner | Launched | Orbit | Status | Track |
|---|---|---|---|---|---|---|---|
| OPS 6675 URSALA IV | 11306 | · | NRO/SAFSP | Mar 16, 1979 | · | Inactive | ◉ |
| OPS 7858 RAQUEL IA | 10734 | · | NRO/SAFSP | Mar 16, 1978 | · | Inactive | ◉ |
| OPS 5366 URSALA III | 09008 | · | NRO/SAFSP | Jul 8, 1976 | · | Inactive | ◉ |
| OPS 6935 TOPHAT II | 07247 | · | NRO/SAFSP | Apr 10, 1974 | · | Reentered | ◉ |
| OPS 7705 URSALA II | 06931 | 1973-088C | NRO/SAFSP | Nov 10, 1973 | 88 min, 96.2° | Reentered | ◉ |
| OPS 7719 MABELI | 05772 | 1972-002D | NRO/SAFSP | Jan 20, 1972 | 88 min, 96.5° | Reentered | ◉ |
| OPS 7681 ARROYO | 05469 | 1971-076B | NRO/SAFSP | Sep 10, 1971 | 88 min, 75.0° | Reentered | ◉ |
| OPS 6829 TOPHAT I | 04722 | 1970-098B | NRO/SAFSP | Nov 18, 1970 | 89 min, 83.1° | Reentered | ◉ |
| OPS 8520 TRIPOS IV | 04406 | 1970-040B | NRO/SAFSP | May 20, 1970 | 88 min, 83.1° | Reentered | ◉ |
| OPS 3402 TIVOLI III | 04343 | 1970-016B | NRO/SAFSP | Mar 4, 1970 | 88 min, 88.1° | Reentered | ◉ |
| OPS 1807 WESTON | 04111 | 1969-082A | NRO/SAFSP | Sep 30, 1969 | 88 min, 69.6° | Reentered | ◉ |
| OPS 4710 SAVANT II | 04103 | 1969-079B | NRO/SAFSP | Sep 22, 1969 | 89 min, 85.1° | Reentered | ◉ |
| OPS 1721 LAMPAN II | 03915 | 1969-041B | NRO/SAFSP | May 2, 1969 | 88 min, 65.7° | Reentered | ◉ |
| OPS 2285 TIVOLI II | 03830 | 1969-026B | NRO/SAFSP | Mar 19, 1969 | 88 min, 83.0° | Reentered | ◉ |
| OPS 2644 OPS 2644 | 03673 | 1969-010B | NRO/SAFSP | Feb 5, 1969 | 114 min, 80.4° | Inactive | ◉ |
| OPS 7684 OPS 7684 | 03605 | 1968-112B | NRO/SAFSP | Dec 12, 1968 | 114 min, 80.4° | Inactive | ◉ |
| OPS 8595 VAMPAN I | 03409 | 1968-078B | NRO/SAFSP | Sep 18, 1968 | 89 min, 83.2° | Reentered | ◉ |
| OPS 5259 TRIPOS III | 03297 | 1968-052B | NRO/SAFSP | Jun 20, 1968 | 88 min, 85.1° | Reentered | ◉ |
| OPS 7076 LAMPAN I | 03153 | 1968-020B | NRO/SAFSP | Mar 14, 1968 | 88 min, 83.0° | Reentered | ◉ |
| OPS 6236 TIVOLI I | 03114 | 1968-008B | NRO/SAFSP | Jan 25, 1968 | 88 min, 81.6° | Reentered | ◉ |
| OPS 1587 FACADE | 03025 | 1967-109B | NRO/SAFSP | Nov 2, 1967 | 88 min, 81.6° | Reentered | ◉ |
| OPS 1873 SAVANT I | 02851 | 1967-062B | NRO/SAFSP | Jun 16, 1967 | 88 min, 80.2° | Reentered | ◉ |
| OPS 1967 FANION III | 02780 | 1967-043B | NRO/SAFSP | May 9, 1967 | 87 min, 84.9° | Reentered | ◉ |
| OPS 6874 FANION II | 02420 | 1966-083B | NRO/SAFSP | Sep 16, 1966 | 88 min, 94.0° | Reentered | ◉ |
| OPS 6810 SAMPAN I | 02397 | 1966-074B | NRO/SAFSP | Aug 16, 1966 | 88 min, 93.1° | Reentered | ◉ |
| OPS 6785 LEIGE | 02172 | 1966-039B | NRO/SAFSP | May 14, 1966 | 88 min, 109.9° | Reentered | ◉ |
| OPS 6761 MAGNUM | 01472 | 1965-062B | NRO/SAFSP | Aug 3, 1965 | 88 min, 107.3° | Reentered | ◉ |
| OPS 6749 FANION I | 01422 | 1965-050A | NRO/SAFSP | Jun 25, 1965 | 88 min, 107.6° | Reentered | ◉ |
| OPS 6717 PUNDIT IV | 01329 | 1965-031B | NRO/SAFSP | Apr 28, 1965 | 88 min, 95.1° | Reentered | ◉ |
| OPS 5063 STEP 13 | 00914 | 1964-068B | NRO/SAFSP | Oct 23, 1964 | 88 min, 95.4° | Reentered | ◉ |
| OPS 3316 Hitchhiker 2 | 00851 | 1964-045B | NRO/SAFSP | Aug 14, 1964 | 88 min, 95.4° | Reentered | ◉ |
| OPS 4923 NOAH'S ARK | 00826 | 1964-036B | NRO/SAFSP | Jul 6, 1964 | 88 min, 92.9° | Reentered | ◉ |
| HITCH HIKER 3 PUNDIT II | 00719 | 1963-055B | NRO/SAFSP | Dec 21, 1963 | 89 min, 64.5° | Reentered | ◉ |
| HITCH HIKER 2 PUNDIT I | 00682 | 1963-042B | NRO/SAFSP | Oct 30, 1963 | 88 min, 89.9° | Reentered | ◉ |
| HITCH HIKER 1 Hitchhiker 1 | 00614 | 1963-025B | NRO/SAFSP | Jun 27, 1963 | 89 min, 81.9° | Reentered | ◉ |
Frequently asked questions
How many P-11 satellites are there?
The catalog lists 35 objects built on the P-11 bus. 5 are in orbit and 30 have reentered.
How many P-11 satellites are in orbit?
5 P-11 objects are currently in orbit, of which 0 carry an active status.
Who builds the P-11 bus?
The P-11 bus is most commonly built by LMSC/EDLS.
When did the first P-11 satellite launch?
The first cataloged P-11 satellite launched in 1963, and the most recent in 1979.